Grab-tool.



No. 885,478. PATENTED APR. 21, 1908. J. G. HOLLINGSWORTH. GRAB TOOL.

APPLICATION FILED JAN. 29, 1908.

ms NORRIS PETERS co wAsmncmN. 0.2:.

UNITED STATES PATENT OFFICE.

JOHN G. HOLLINGSWORTH, OF LEBANON, SOUTH DAKOTA.

GRAB-TOOL.

Application filed. January 29, 1908.

T 0 all whom it may concern:

Be it known that 1, JOHN G. HoLLINes- WORTH, cit1zen of the United States, residing at Lebanon, in the county of Potter and State of South Dakota, have invented new and useful Improvements in Grab-Tools, of which the following is a specification.

My invention relates to that class of devices known as grab tools adapted for withdrawing broken drills, rods, etc. from drill holes.

The object of the invention is to provide a device of the character named which will be effective in o eration, and may be manufactured at smal cost.

The invention consists of a tube provided with a stationary clamping jaw, in combina tion with a cooperating movable jaw, adapted to be raised and lowered within the tube; and the construction of the improvement will be fully described hereinafter in connection with the accompanying drawing which formspart of this specification, and its novel features will be defined in the appended claims.

In the drawing :Fi ure 1 is a central vertical section of a tool: embodying the invention, and Fig. 2 is a transverse section of the same on the line 22 of Fig. 1.

The reference numeral 1 designates a tube of such diameter as will adapt it to be readily lowered into a drill hole formed on its inner surface and adjacent to its lower end with an enlargement 2 of substantially crescent shape, and extending only partly around the tube as shoWn in Fig. 2. This enlargement is convex or rounded in cross section and constitutes the fixed clamping jaw of the tool, and is adapted to cooperate with a movable jaw 3, WhlCh is ap roximately of crescent sha e, and rovidec on its concave surface Wit upwar ly projecting teeth 4.

Specification of Letters Patent.

Patented April 21, 1908.

Serial No. 413,253.

The toothed surface of the jaw 3 is beveled or inclined to coact with the convex surface of the fixed jaw 2, and said jaw is suspended within the tube 1 by means of a suitable wire 5, the lower end of which is secured to an eye 6 formed at the upper end of a rod 7 projecting from the upper end of the jaw 3.

The utility and operation of the tool constructed as thus described may be explained as followsz lvhen it becomes necessary to remove a broken drill, rod, or other implement from a drill hole, the grab or fishing tool is lowered into the drill hole, and the obstruction to be removed (illustrated by the dotted lines in Fig. 1) enters the lower end of the tube 1. The suspended toothed jaw is then manipulated by means of its suspending wire 5, until the upper end of the rod or other implement to be withdrawn is firmly clamped between the fixed jaw 2, and the toothed movable jaw, after which the tube 1 is drawn up, ,bringing with it the article clamped therein.

I claim Agrab tool com )rising a tube formed on its inner surface and adjacent to its lower end with an integral enlargement of substai'itially crescent shape, and rounded in cross section; in con'lbination with a movable aw of concave-convex form having its concave face inclined and formed with upwardly projecting teeth; and means for suspending said movable jaw within the tube.

Iii-testimony whereof I aHix my signature in presence of two witnesses.

JOHN G. I-IOLLINGSWORT l I.

l/Vitnesses:

it. A. JACKSON, GENEVIEVE JACKSON. 

